@I need to fix it: Based on the nature of your query, and the troubleshooting steps you have already attempted, I recommend reaching out to the relevant support team in your region, who will be able to arrange for the phone to be inspected and repaired by an authorised Samsung engineer.
With this in mind, please head to samsung.com > Scroll to the bottom of the page > Contact us (or check the 'Support' section), and get in touch via your preferred channel, and an advisor will be on hand to assist you further.
I have aGalaxy S21 ~
I left my phone in the car and it got super hot. I cooled it off momentarily in the fridge and then let it cool to room temp after that with no trouble. I figured the condenser in the fridge that dries out rice would be effective on reducing moisture... regardless I did it to keep from frying it. Play on phone a couple hours till I forgot to plug it in and battery dies. After charging nearly full with it off (didnt think of the port not warning me of moisture during off charge) turned it on and it came on phone. No longer on charge. Few minutes later I noticed the device was flickering as if my but was activating the screen touch or tap to view screen thing, so i movedit away from my leg and continued whatever then. Shortly after that i pick up phone and (tho its been beeing super slow since last update, and refused to open sometouch button actions when i click them like notifications that usually open an app when touched) I opened the screen lock to fine the screen not giving me the unlock pattern pad and flickering back to black. Turning on with phisical button but not staying on long enough to unlock or get much farther unusually and phoneenot responding to any setting button or drop down menue button. So I cut it off and back on. After this it actually got worse, was in a failing to start start loop. Nearly impossible to get to touch the screen while awake at all at this point. Did eventually unlock it fast enough to restart it and it seemed to work normal a gain for a bit. Then a few days later the screen starts popping up with this server software issue detected stuff. I have had nearly the whole scenario repeat again at least once and some of the smaller issues pop up on occasion as well as seeing the software pop up warning several times a day. I have had it in a loop I couldn't get it out of to save my life but at my wits end and end of hope I noticed the phone was really hot, and not charging and in My hand had been refusing me the screen on or touch response a good hour, so I put it in the fridge again. Funny thing is it went in the fridge at 40% battery, within 15 minutes I forgot I put in the fridge maybe half an hour at most and looked for it for maybe 10 minutes and then the location on the phone died and didn't show online anymore (couldn't heat phone ringing inside fridge before it died) by time I found the phone it had died and turned off, stopoing it from it death start looping. When I turned it back on after finding it and letting it charge about 20% before turning it on. It was acting normal (shitty normal) again and not looping, usable for the most part normal again. The looping always happens after it turns off from dead battery (Phone dies, normal functioning prior then starts up brokwn) turns out to it's almost the only thing that stops it too... dying that is.
